Near-field communication antenna device

Abstract

The invention provides a near-field communication antenna device, and belongs to the field of wireless communication. The antenna device is an antenna device formed in electronic equipment. The antenna device comprises a shell conductor layer, a first insulating layer, a first coil conductor, a flexible substrate, a second coil conductor, a second insulating layer and a magnetic material layer. The first coil conductor and the second coil conductor are respectively arranged at the two sides of the flexible substrate and connected via a through hole. When the first coil conductor is overlooked, the first coil conductor is divided into a first area in which the conductive wires of the first coil conductor and the second coil conductor are completely overlapped or partially overlapped; and a second area in which the conductive wires of the first coil conductor and the second coil conductor are not overlapped completely or not overlapped partially. Insulating processing is performed on the surfaces of the coil conductors of the two sides of the flexible substrate. The shell conductor layer completely covers the second area and does not cover the first area completely. Long-distance communication is realized by the antenna device without damaging the electronic equipment shell metal structure; and the size of the antenna device is reduced on the basis of guaranteeing antenna communication distance.

Description

Technical field [0001] The present invention relates to an antenna device used in an RFID system, an NFC system, and a short-distance wireless communication system that communicate with a counterpart device through electromagnetic field signals. Background technique [0002] In recent years, with the continuous promotion and use of RFID systems and NFC systems, in order to communicate between mobile electronic devices or between mobile electronic devices and basic card reader devices, various devices, especially handheld mobile electronic devices, are equipped with NFC systems. Communication antenna. Existing RFID or NFC antennas are mostly designed with 3 to 4 turns due to the line width and are assembled inside the mobile device housing. With the emergence of mobile electronic devices equipped with metal casings, the service life of the mobile electronic devices and the wear resistance of the device casings have been greatly improved, providing users with a better experience. ...

AI Technical Summary

Problems solved by technology

However, this solution has the following problems: First, the structure needs to have holes on the conductor layer covering the antenna, and a gap needs to be made on one side of the hole, which structurally destroys the integrity of the conductor layer. If the shell of the mobile device If the structural design does not allow opening holes to destroy its appearance integrity or structural support characteristics, the structure will be subject to great application restrictions; second, in this structure, the electromagnetic field generated by the antenna needs to bypass the conductor layer, and the electromagnetic field is in the In the process of bypassing the conductor layer, the conductor layer will cause greater attenuation to the electromagnetic field, and the degree of attenuation is related to the length of the conductor layer bypassed. Therefore, this structure is used when the antenna is assembled on a wider conductor layer, that is, in a mobile device with a larger metal casing. In the terminal, its communication effect will be affected

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